Behr, Arno (tu Dortmund University, Seidensticker, Thomas (tu Dortmund University, Vogt, Dieter (tu Dortmund University (1) Hill, Edward (1) Frost, Robert (1) Singer, Judith D. (james Bryant Conant Professor, Willett, John B. (charles William Eliot Professor (1) Twisk, Jos W. R. (amsterdam University Medical Centers) (1)